JPH0992893A - Current lead device - Google Patents

Abstract

(57) Abstract: To prevent an increase in heat intrusion due to natural convection of a refrigerant gas. A lead body (conductor) 11, an insulating member 12, and a pipe 13 are provided, and a gas 14 of a refrigerant is retained or made to flow in a gap between the lead body 11 and the insulating member 12 to cool the lead body 11. In the current lead device, the refrigerant gas 14 is formed in the gap between the lead body 11 and the insulating member 12.
A partition member 16 for increasing the flow path resistance to
The current lead device is characterized in that natural convection of the refrigerant gas 14 is suppressed and the amount of heat penetration is reduced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a current lead device for electrically connecting a superconducting device (superconducting magnet or the like) cooled to a cryogenic temperature and a power source arranged at room temperature.

[0002]

2. Description of the Related Art The greatest feature of superconductivity is that a large current can flow without loss, and a superconducting magnet is a typical example of its application. This superconducting magnet requires a current lead device (hereinafter referred to as a current lead) that supplies a current from a power source arranged at room temperature to a superconducting magnet arranged at a cryogenic temperature.

This current lead is usually made of copper having a small electric resistance, but since Joule heat is generated during energization, this heat generation causes heat to flow from the current lead itself into the liquid helium tank or forced by a heater or the like. A gas-cooled current lead is used that is cooled by the helium gas that has been vaporized by the effective heat input.

FIG. 12 shows a typical example of a current lead used conventionally. In the conventional cryogenic current lead, the conductor 11 is arranged in the center through the insulating member 12 provided in the pipe 13. Then, the helium gas evaporated from the liquid helium tank is caused to flow along the space between the conductor 11 and the insulating member 12 outside the conductor 11. This helium gas flows from the low temperature side to the high temperature side.

However, the conventional current lead configured as described above has the following problems.
That is, the helium gas flow path for cooling the conductor 11 flows straightly by simply passing through the gap between the cylindrical conductor 11 and the insulating member 12. Therefore, when the helium gas for cooling does not flow, The helium gas staying in the space between the conductor 11 and the insulating member 12 between the low temperature side and the low temperature side easily causes natural convection as shown in FIG. In the case of convection, the heat is transferred from the high temperature side to the low temperature side, increasing the amount of heat penetration.

Further, since the conductor 11 is not particularly supported in the long section of the pipe 13, the conductor 11 is easily eccentric as shown in FIG. 12C, and the helium gas for cooling causes the conductor 11 and the insulating member 12 to be eccentric. A large amount of the gap (flow path) flows between the conductors 11 to make the cooling of the conductor 11 non-uniform, causing the conductor 11 to locally reach a high temperature, or to reduce the cooling efficiency of the conductor 11.

When a superconducting magnet mounted on a magnetic levitation train is assumed as the superconducting device, the superconducting magnet mounted on the magnetic levitation train vibrates due to a disturbance such as a ground coil. The current leads attached to this superconducting magnet also vibrate similarly. Therefore, due to this vibration, the conductor 11 and the insulating member 12, or the insulating member 12 and the airtight pipe 13 cause chatter vibration and rub against each other, and frictional heat is generated to increase the amount of heat intrusion.

[0008]

As described above, in the conventional current lead device, the flow path of the helium gas for cooling is formed in a straight line, and when the gas does not flow, the natural gas of the stagnant gas is generated in the gas flow path. There is a problem that convection easily occurs and the amount of heat penetration increases.

Further, in a conventional current lead device mounted on a superconducting system such as a magnetic levitation train, which is susceptible to vibration, internal components of the current lead device cause chattering vibrations due to vibrations caused by disturbances and rub against each other. There is a problem that frictional heat is generated to increase the amount of heat penetration.

Therefore, the present invention makes it difficult to cause natural convection in the gas flow passage when the cooling gas is not flown in the gas-cooled type current lead device, and further, the friction heat generated by the mutual rubbing of the members. To reduce fever,
It is an object of the present invention to provide a cryogenic current lead device having a structure that reduces the amount of heat penetration from the high temperature side to the low temperature side.

Further, even when the vibration is caused by a disturbance, the parts inside the current lead device do not cause chattering vibration, thereby suppressing the generation of frictional heat and reducing the amount of heat intrusion. It is intended to provide a lead device.

[0012]

SUMMARY OF THE INVENTION A current lead device according to the present invention has a lead body for electrically connecting a superconducting device cooled by a refrigerant and a power source, and a gap for covering the periphery of the lead body. An insulating member that is held and arranged, and a pipe that houses the lead body and the insulating member are provided, and the gas of the refrigerant is retained or flowed in a gap between the lead body and the insulating member, and The current lead device for cooling the lead body is characterized in that a partition member for increasing a flow path resistance to the refrigerant gas is arranged in a gap between the lead body and the insulating member.

The partition member has an outer diameter slightly larger than the inner diameter of the insulating member and supports the conductor with respect to the insulating member. Further, the partition member is composed of a wire wound in a spiral shape around the lead body.

Further, the current lead device of the present invention comprises a lead body for electrically connecting the superconducting device and the power source,
In a current lead device including an insulating member arranged with a gap so as to cover the periphery of the lead body, and a pipe accommodating the lead body and the insulating member, the insulating member is provided for the pipe. It is characterized in that a supporting means for supporting is provided.

Further, the current lead device of the present invention comprises a lead body for electrically connecting the superconducting device and the power source,
In a current lead device provided with a pipe arranged with a gap so as to cover the periphery of the lead body, an insulating member is provided in the gap between the pipe and the lead body, and the lead body is fixed by the insulating member. It is characterized in that the pipe is supported.

In the current lead device constructed as described above, by providing the partition member, the conduit resistance of the refrigerant gas becomes high, and the natural convection of the retained refrigerant gas when the refrigerant gas does not flow is greatly reduced. You can Therefore,
Conventionally, the natural convection of the refrigerant gas prevents the refrigerant gas from flowing from the high temperature side to the low temperature side and increasing the amount of heat penetration,
A current lead device with a low heat penetration amount can be provided.

Further, even when the cooling gas is flowed, the partition member functions as a cooling fin, so that the heat transfer coefficient is increased and the cooling efficiency of the lead body is improved. Further, by providing a partition member larger than the gap between the lead body and the insulating member (a partition member having an outer diameter slightly larger than the inner diameter of the insulating member), the lead body or the insulating member can be elastically deformed and brought into contact with each other, Higher rigidity against vibration.

Further, in the current lead device of the present invention, the lead body or the insulating member provided outside the lead body is supported by the pipe at intervals such that chatter vibration does not occur, so that components other than the support points are mutually connected. Since it does not come into contact with, it is possible to prevent rubbing wear due to chatter vibration.

[0019]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 11 are views showing an embodiment of a gas-cooled type current lead device (hereinafter abbreviated as a current lead) according to the present invention, and FIGS. 1 to 3 show from a high temperature side to a low temperature side. An example of an embodiment of a current lead having a structure for reducing the amount of heat penetration, and FIGS. 4 to 11 show that the parts inside the current lead do not cause chatter vibration and suppress the generation of frictional heat. 7 illustrates an example embodiment of a current lead having a reduced amount of structure.

First, in FIG. 1, a lead body (hereinafter referred to as a conductor) 11 made of, for example, brass is provided inside a hollow insulating member 12 made of fiber reinforced plastic (FRP) with one side gaps A1 and A2. is set up. The conductor 11 is disposed substantially at the center of the hollow insulating member 12 so that the gaps A1 and A2 have substantially the same value.

A refrigerant gas for cooling (hereinafter, helium gas will be used as an example) 14 flows or stays in the gap between the conductor 11 and the insulating member 12. The conductor 11 is electrically connected to a power source on the room temperature side and to a superconducting device such as a superconducting magnet on the cryogenic side. The helium gas 14 flowing through the gap between the inside of the insulating member 12 and the conductor 11 cools the conductor 11 by effectively utilizing the sensible heat.

In the example shown in FIG. 1, the conductor 11 and the insulating member 12 are used.
As an example of a partition member, the conductor 11
The wire 16 is attached to the surface of the. The wire 16 is made of the same material as the conductor 11, for example, brass, and spirally adheres to the outer surface of the conductor 11 and is wound to form a gas flow path in a spiral shape.
Although the wire 16 has a circular cross-sectional shape in FIG. 1, the wire 16 may have a rectangular shape, an elliptical shape, or the like as long as the adhesion of the conductor 11 can be ensured. There may be more than one. Further, in order to improve the heat transfer coefficient between the conductor 11 and the wire 16, it is also desirable to connect them by welding, silver brazing or the like.

The current lead thus constructed is spirally wound when the gas is not cooled, that is, when the refrigerant gas is retained in the gap between the conductor 11 and the insulating member 12. The wire 16 increases the flow path resistance (pipe line resistance) of the gas flow path, making it difficult for the retained helium gas to naturally convect. By preventing natural convection, heat invasion from the high temperature side to the low temperature side via the gas is prevented. Further, at the time of cooling the gas, the gas flows along the spiral shape of the wire 16 wound around it, and the wire 16 as a partition member functions as a cooling fin, so that the heat transfer coefficient is increased and the conductor 11 is cooled. Efficiency is improved.

Since the conductor 11 is not eccentric to the insulating member 12 by providing the wire 16, the conductor 1
The cross-sectional area of the gas flow path around 1 becomes uniform, and the cooling gas flows evenly around the conductor 11, so that the conductor 11 can be cooled uniformly.

The wire diameter D of the wire 16 and the gap A on one side
The relationship between 1 and A2 is 2D> A1 + A2, and the wire 16 diameter (D) from the gaps A1 and A2.
Is slightly larger, the conductor 11 and the insulating member 12 are in contact with each other while being elastically deformed in a spiral shape and pressed against each other. As a result, even if the current lead is installed in a system that is susceptible to vibration such as a magnetic levitation train and is subject to disturbance, the rigidity against vibration is increased and the conductor 1
1 and the insulating member 12 are configured so as to prevent chatter vibrations from colliding with each other to generate heat.

Next, in the example shown in FIG. 2, a partition ring 25 having slits is provided as a partition member instead of the wire 16 shown in FIG. 1, and the same parts as those in FIG. 1 are the same. The reference numerals are given and the description is omitted.

The partition ring 25 is made of a material equivalent to that of the conductor 11, for example, brass, and is provided in close contact with the outer surface of the conductor 11, and the slit positions are shifted by adjacent partition rings 25 (FIG. 2). Are shifted by 180 degrees), and are connected and attached to the conductor 11 by welding, silver brazing, or the like.

The partition ring 25 may have any shape, and is arranged in an appropriate number within a range satisfying the condition for the conductor 11 to be cooled well. In addition, it is not necessary to shift the position of the slit by 180 degrees with the partition ring of each other,
As long as the gas passages are displaced so as to increase the passage resistance, the arrangement may be such that the spiral passages shown in FIG. 1 are sequentially displaced.

Also in the current lead configured as shown in FIG. 2, when the gas is not cooled, that is, when the gas remains in the gap between the conductor 11 and the insulating member 12, the partition ring 25 is provided. As a result, the flow path resistance of the gas flow path becomes high, and it becomes difficult for the retained helium gas to naturally convect. By preventing natural convection, heat invasion from the high temperature side to the low temperature side via the gas is prevented. When cooling the gas, the gas flows along the slits provided in the partition ring 25, and at the same time, the partition ring 2 serving as a partition member.
Since 5 serves as a cooling fin, the heat transfer coefficient is increased and the cooling efficiency of the conductor 11 is improved.

Since the partition ring 25 is provided,
Since the conductor 11 is not eccentric with respect to the insulating member 12, the cross-sectional area of the gas flow path around the conductor 11 becomes uniform, and the cooling gas flows evenly around the conductor 11 so that the conductor 11 can be cooled uniformly. .

The partition ring 25 is, of course, in close contact with the conductor 11, but is in contact with the insulating member 12 so as to be pressed against it, so that the current lead is subjected to vibration of a magnetic levitation train or the like. It is mounted in a system that is easy to operate, and has high rigidity against vibration even when subjected to a disturbance, and prevents the conductor 11 and the insulating member 12 from chattering vibrations and colliding with each other to generate heat.

FIG. 3 shows an example in which, instead of the wire 16 shown in FIG. 1, a partition 15 corresponding to the wire 16 serving as a partition member is integrally formed so as to project from the surface of the conductor 11. Are denoted by the same reference numerals and description thereof will be omitted.

In this example, the partition 15 is formed so as to integrally project from the conductor 11 so as to form a spiral gas flow path. In the example shown in FIG. 3, the manufacturing process of connecting the partition member to the conductor 11 by welding or the like as in the previous two examples can be omitted, and since the conductor 11 and the partition 15 are integrally formed, Since there is no connection thermal resistance, the heat transfer coefficient can be maximized.

Also in the current lead configured as shown in FIG. 3, the partition 15 is provided when the gas is not cooled, that is, when the gas remains in the gap between the conductor 11 and the insulating member 12. As a result, the flow path resistance of the gas flow path increases, and it becomes difficult for the retained helium gas to naturally convect. By preventing natural convection, heat invasion from the high temperature side to the low temperature side via the gas is prevented. Further, when the gas is cooled, the gas flows along the partition 15 and the partition 15 as a partition member functions as a cooling fin.
The heat transfer coefficient is increased, and the cooling efficiency of the conductor 11 is improved.

Since the partition 15 is formed, the conductor 11 is not eccentric with respect to the insulating member 12.
Since the cross-sectional area of the gas flow path around the conductor 11 becomes uniform, the cooling gas flows evenly around the conductor 11, and the conductor 11 can be cooled uniformly.

Since the partition 15 is in contact with the insulating member 12 so as to be pressed against it, the current lead is mounted in a system such as a magnetic levitation train that is susceptible to vibration, and it will be vibrated even when subjected to disturbance. Rigidity increased, conductor 11
The insulating member 12 and the insulating member 12 are configured to prevent chatter vibrations from colliding with each other and generating heat.

FIG. 4 shows an embodiment of a current lead for suppressing the generation of frictional heat and reducing the amount of heat penetration without the parts inside the current lead causing chatter vibration.
The insulating member 12 is connected to the pipe 13 at intervals such that chatter vibration does not occur.
It is an example supported by.

In the description of FIGS. 4 to 11, too,
The same parts as those in FIGS. 1 to 3 are designated by the same reference numerals and the description thereof will be omitted. The support structure of FIG. 4 has one or more local depressions (dents) 17 around the airtight pipe 13 or the pipe 13
This is an example in which a ring-shaped recess 17 is provided over the entire circumference of. The local depressions 17 can be easily provided in the pipe 13, and the depressions 17 are alternately arranged in the axial longitudinal direction of the pipe 13.
By providing the insulating member 12, the insulating member 12 can be elastically deformed, and the rigidity against vibration can be increased. In addition, since the insulating member 12 is supported over the entire circumference by providing the ring-shaped recess 17, the supporting force can be increased.

Further, the conductor 11 and the insulating member 12 are supported by a partition member such as the wire 16 as shown in FIG. 1, but since the operation and effect of this structure have been described above, detailed description will be omitted. Omit it.

According to the current lead configured as in the example shown in FIG. 4, the current lead is mounted in a system such as a magnetic levitation train which is susceptible to vibrations, and the insulating member 12 remains even if it is subjected to disturbance. Since the recess 17 firmly supports the pipe 13, the rigidity against vibration is increased, and the insulating member 12 and the pipe 13 are prevented from generating chatter vibration and colliding with each other to generate heat. There is.
Further, similarly to the example shown in FIG. 1, since the conductor 11 and the insulating member 12 are supported by the partition member such as the wire 16, chatter vibration is generated, and it is configured so as to prevent them from colliding with each other and generating heat. There is.

Since the recess 17 has a larger supporting force as the contact area between the pipe 13 and the insulating member 12 is larger, the recess 17 is set to have a predetermined supporting force without chatter vibration. Is desirable.

FIG. 5 is similar to FIG.
The structure is for supporting the insulating member 12 and the insulating member 12, but the process for forming the recess 17 is described. That is, the airtight pipe 13 is sandwiched by the jig 21 or the like and a part thereof is crushed, and the crushed part is configured as the recess 17 described in FIG.

As described above, the recess 17 can be formed by simply crushing a part of the pipe 13 with the jig 21 or the like, so that the insulating member 12 can be easily supported with respect to the pipe 13. By alternating the crushing direction in the axial longitudinal direction of the pipe 13, it is possible to support vibrations in all directions. In FIG. 5, the pipes 13 are crushed from both sides, but the number of crushed regions can be set as appropriate if the number is one or more.

Further, by designing various shapes of the jig 21, it is possible to easily form the recess 17 so as to have a large contact area between the pipe 13 and the insulating member 12. As a result, a predetermined supporting force that does not easily cause chatter vibration can be obtained.

FIG. 6 shows an example of a structure in which the support fitting 22 is welded to the airtight pipe 13, the push screw 18 is screwed into the weld, and the push screw 18 is brought into contact with the insulating member 12 to support it. The screw 18 is welded and fixed.

The location and number of the push screws 18 are as follows.
Various selections can be made within a range where a predetermined supporting force can be obtained. By managing the torque of the push screw 18, it is also possible to tighten the pipes 13 and the insulating member 12 with a supporting force that is relatively movable in the axial direction in order to absorb the difference in heat shrinkage ratio between the pipes 13 and the insulating member 12.

When the push screw 18 is used, the tightening torque of the push screw 18 can be controlled and maintained at a predetermined tightening torque, and the tightening torque can be kept constant, so that quality control is easy to perform. In addition, in order to prevent the insulating member 12 from being worn away by friction due to vibration, a set screw 18
A spacer 26 for protecting the insulating member 12 may be inserted between the insulating member 12 and the insulating member 12.

Also in the current lead thus constructed, even if the current lead is installed in a system such as a magnetic levitation train which is susceptible to vibration and is subjected to disturbance, the insulating member 12 is pushed by the push screw 18 into the pipe 13 Since it is firmly supported against, the rigidity against vibration is increased. Therefore, it is possible to prevent the insulating member 12 and the pipe 13 from chattering, colliding with each other, and generating heat. Further, similarly to the example shown in FIG. 1, since the conductor 11 and the insulating member 12 are supported by the partition member such as the wire 16 (only in the drawing, the drawing number is omitted), chatter vibration is prevented, and they collide with each other to generate heat. It is configured so as to prevent it.

In FIG. 7, a fixing metal piece 19 which is divided in the circumferential direction is provided between the insulating member 12 and the airtight pipe 13, and the pipe 13
A structure for supporting the insulative member 12 further inscribed by engaging and welding the tightening fitting 23 previously welded to the above, and by tightening the fixing fitting 19 due to thermal contraction of the tightening fitting 23 at this time. Is an example of. In this case, the insulating member 12 is clamped by a supporting force that is relatively movable in the axial direction in order to absorb the difference in heat shrinkage between the pipe 13 and the insulating member 12. The number of divisions of the fixing bracket 19 is not limited to the illustrated example.

It should be noted that there is a gap between the pipe 13 and the insulating member 12 and there is no contact, except at the support point between the fixing member 19 and the insulating member 12. Therefore, frictional heat due to rubbing does not occur, and frictional heat is generated even if the insulating member 12 and the pipe 13 move relative to each other in the axial direction in order to absorb the difference in thermal contraction rate between the pipe 13 and the insulating member 12. Will be minimized.

Even in the current lead thus constructed, even if the current lead is installed in a system such as a magnetic levitation train which is susceptible to vibration and is subject to disturbance, the insulating member 12 is attached to the pipe 13 by the fixing fitting 19. Since it is firmly supported against, the rigidity against vibration is increased. Therefore, the insulating member 12 and the pipe 13 do not generate chattering vibration, and it is possible to prevent them from colliding with each other and generating heat. Further, similarly to the example shown in FIG. 1, since the conductor 11 and the insulating member 12 are supported by the partition member such as the wire 16 (only in the figure, the drawing number is omitted), chatter vibration does not occur and they collide with each other to generate heat. It is configured to prevent this.

FIG. 8 shows an example of the construction in which the fastening metal fitting 23 shown in FIG. 7 is omitted by forming a part of the periphery of the airtight pipe 13 in a trumpet shape in cross section. It is natural that the same actions and effects as the current lead shown in FIG. 7 can be obtained, and the number of parts is reduced and the number of welded portions is reduced as compared with the example of FIG. Is improved.

FIG. 9 shows a modified example of FIGS. 7 and 8 and has a structure in which the fixing metal fitting 19 is tightened with the cap nut 29. In this example, the fixing member 19 can be tightened by a mechanical force, and the same action and effect as the current lead shown in FIG. 7 can be obtained.

FIG. 10 shows a structural example in which the insulating resin 20 is injected into the gap between the conductor 11 and the pipe 13 and the insulating member 12 is omitted. The flow path for flowing the helium gas for cooling is
A gas passage hole is formed in the insulating resin 20, and the insulating resin 20 is provided in the pipe 13 at a ratio sufficient to support the conductor 11.

In the current lead thus constructed, even if the current lead is installed in a system such as a magnetic levitation train which is susceptible to vibration and is subject to disturbance, the conductor 11
Is firmly supported on the pipe 13 by the insulating resin 20, so that the rigidity against vibration is increased. Therefore, chatter vibration does not occur between the conductor 11 and the pipe 13, and it is possible to prevent the conductor 11 and the pipe 13 from colliding with each other and generating heat.

FIG. 11 is characterized in that the conductor 11 has a hollow structure and the helium gas for cooling is made to flow inside the conductor 11. This hollow conductor 11 and pipe 13
Between the conductor 11 and the pipe 13, the insulating member 24 is injected over almost the entire length of the gap between the conductor 11 and the pipe 13,
The whole is fixed to the pipe 13.

The insulating member 24 is made of epoxy resin, FR.
Electrical insulation of P resin, ceramics, alumina, etc. is maintained, and conductor 11 and pipe 1 are made of liquid and powder at room temperature.
It is made of a material that can be injected or filled into the gap 3. In the current lead configured in this way, the same action and effect as in the previous example such that heat generation due to frictional wear between the conductor 11 and the pipe 13 is prevented can be obtained.

[0058]

As described above, according to the present invention,
By providing a partition member on the surface of the conductor (lead body), the conduit resistance (flow path resistance) is increased, and natural convection of stagnant gas can be prevented when cooling gas does not flow, minimizing heat intrusion. Can be suppressed. Further, the partition member exerts the function of the cooling fin and the heat transfer coefficient is increased, so that the cooling efficiency of the conductor is improved. Further, by supporting the insulating member or the conductor with respect to the pipe, vibration can be prevented and frictional heat generated by rubbing against each other can be suppressed to the minimum.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram showing an example of a current lead of the present invention.

FIG. 2 is a schematic configuration diagram showing an example of a current lead of the present invention.

FIG. 3 is a schematic configuration diagram showing an example of a current lead of the present invention.

FIG. 4 is a schematic configuration diagram showing an example of a current lead of the present invention.

FIG. 5 is a schematic configuration diagram showing an example of a current lead of the present invention.

FIG. 6 is a schematic configuration diagram showing an example of a current lead of the present invention.

FIG. 7 is a schematic configuration diagram showing an example of a current lead of the present invention.

FIG. 8 is a schematic configuration diagram showing an example of a current lead of the present invention.

FIG. 9 is a schematic configuration diagram showing an example of a current lead of the present invention.

FIG. 10 is a schematic configuration diagram showing an example of a current lead of the present invention.

FIG. 11 is a schematic configuration diagram showing an example of a current lead of the present invention.

FIG. 12 is a cross-sectional view showing a conventional gas-cooled cryogenic current lead.

[Explanation of symbols]

 11 conductor (lead body) 12 insulating member 13 piping 14 helium gas (refrigerant gas) 15 partition (partitioning member) 16 wire (partitioning member) 17 recess (supporting means) 18 push screw (supporting means) 19 fixing metal fitting (supporting means) 20 Insulating Resin (Support Means) 21 Jig 22 Support Fitting 23 Tightening Fitting 24 Insulating Member (Support Means) 25 Partition Ring (Partitioning Member) 26 Spacer 29 Cap Nut

Claims (5)

[Claims] 1. A lead body for electrically connecting a superconducting device cooled by a refrigerant and a power source, an insulating member arranged with a gap so as to cover the periphery of the lead body, and the lead. A current lead device, comprising: a main body and a pipe for accommodating the insulating member, wherein the gas of the refrigerant stays or flows in a gap between the lead main body and the insulating member to cool the lead main body. A current lead device, characterized in that a partition member for increasing the flow path resistance to the refrigerant gas is arranged in a gap between the main body and the insulating member. 2. The current lead according to claim 1, wherein the partition member has an outer diameter slightly larger than the inner diameter of the insulating member, and supports the conductor with respect to the insulating member. apparatus. 3. The current lead device according to claim 1, wherein the partition member is a wire wound in a spiral shape around the lead body. 4. A lead body for electrically connecting a superconducting device and a power source, an insulating member arranged with a gap so as to cover the periphery of the lead body, the lead body and the insulating member. In a current lead device including a pipe that accommodates the pipe, a support device that supports the insulating member with respect to the pipe is provided. 5. A current lead device comprising a lead body for electrically connecting a superconducting device and a power source, and a pipe arranged with a gap so as to cover the periphery of the lead body, A current lead device, wherein an insulating member is provided in a gap between the pipe and the lead body, and the lead body is supported by the insulating member with respect to the pipe.